[Config] Add VSCode workspace files to .gitignore (#12469)

.gitignore

@@ -50,6 +50,7 @@ doxygen/
 .browse.VC.db*
 *.stackdump
 # Let these ones be user specific, since we have so many different configurations
+*.code-workspace
 .vscode/c_cpp_properties.json
 .vscode/launch.json
 .vscode/tasks.json